193 
a new Genus of Endophytic Algae. 
surface ; and when they finally break through, and are freed 
from tension, they project through the opening with a slight 
bend in the opposite direction. The portion of the tough 
cell-membrane of the Cladophora which covers the sori of the 
Schmitziella is, of course, very much stretched locally when 
the tetraspores and carpospores are mature, but owing to its 
rigidity it does not collapse after their discharge but retains 
the form of the sorus. 
Antheridia have not been observed. 
The genus Schmitziella belongs without any doubt to the 
Order Corallinaceae, although of course it differs in some 
points from all the other genera. The formation of the thallus 
in particular differs from that of the great majority of the 
members of the Order, but a nearly similar formation is to be 
found in Melobesia callithamnioides , Falkbg. and Hapalidium 
callithamnioides , Crn. Its endophytic mode of life, again, finds 
its analogue in the parasitic genus Choreonema , Schmitz, with 
which, however, it has very little else in common. The 
distinguishing characteristic of the genus consists in the 
absence, in all but the most rudimentary form, of the en- 
closing wall with which the reproductive organs of all the 
other Corallinaceae are surrounded. The reproductive organs 
of Schmitziella are produced, as has been shown, in unen- 
closed nemathecial sori surrounded by a ring of very short 
paraphyses, while those of all the other genera are enclosed in 
conceptacles with but a small apical opening. 
The filamentous thallus with its thin cell-walls which do 
not contain a vestige of chalk, the endophytic mode of life, 
and above all the unenclosed sori of Schmitziella , taken either 
singly or all together, separate it from all the other genera of 
the Order and mark it as a distinct and well-defined genus. 
In conclusion, I would return my sincere thanks not only to 
Dr. Bornet for his advice and assistance in the preparation of 
this paper, but also to Prof. Schmitz, who has kindly placed 
his notes, based on an examination of the specimens sent to 
him by Dr, Bornet and myself, at my disposal. 
